Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSHONDA2006ELEMENT EX, 2.4 YH1, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMADVANCED DIAGNOSTICSDTC P0420: CATALYST SYSTEM EFFICIENCY BELOW THRESHOLDENABLE CONDITIONS
2006 Honda Element EX, 2.4 YH1, Standard
Enable Conditions
2006 Honda Element EX, 2.4 YH1, StandardSECTION Enable Conditions
ENABLE CONDITIONS
| Condition | Minimum | Maximum | |
|---|---|---|---|
| Engine coolant temperature | 156°F (69°C) | - | |
| Intake air temperature | -13°F (-25°C) | - | |
| Estimated TWC temperature | 932°F (500°C) | - | |
| Engine speed | A/T | 1,150 rpm | 3,250 rpm |
| M/T | 1,200 rpm | 3,750 rpm | |
| MAP value | 22 kPa (6.3 in.Hg, 160 mmHg) | 73 kPa (21.6 in.Hg, 550 mmHg) | |
| Vehicle speed | 4 mph (5 km/h) | - | |
| Fuel trim | 0.69 | 1.47 | |
| Fuel feedback | Closed loop | ||
| Monitoring priority | P0442, P0456, P0457, P0497 | ||
| No active DTCs | P0010, P0011, P0107, P0108, P0112, P0113, P0117, P0118, P0133, P0134, P0135, P0137, P0138, P0139, P0141, P0171, P0172, P0300, P0301, P0302, P0303, P0304, P0335, P0339, P0340, P0341, P0344, P0443, P0496, P1009, P1109, P1128, P1129, P1157, P1172, P2195, P2227, P2228, P2229, P2238, P2252, P2270, P2271, P2646, P2647, P2648, P2649, P2A00 | ||
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.